Rotary pump.



Patented Aug. I, I899.

No. 630,0l3.

B. F. TABER.

ROTARY PUMP.

(Application filed Sept. 13, 1895.)

2 Sheets-Sheet I.

(No Model.)

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Patented Aug. I, I899. B. F. TABER.

ROTARY PUMP.

(Application filed Sept. 13, 1895 2 Sheets-$heet 2.

(No Model.)

& E S S E N 1 I. W

INVENTOR.

ATTORN EYS.

UNITED STATES PATENT OFFICE.

BENJAMIN F. TABER, OF BUFFALO, YORK, ASSIGNOR TO BRIGHT C.

TABER, OF SAME PLACE.

ROTARY PU M P.

SIEECIFIGATION forming part of Letters Patent No. 630,013, dated August1, 1899. Application filed. September 13, 1896. Serial No. 562,378. (Nomodel.)

To all whom it may concern.-

Be it known that I, BENJAMIN F. TABER, a citizen of the United States,residing at Buf falo, in the county of Erie and State of New York, haveinvented new and useful Improvements in Rotary Pumps, of which thefollowing is a specification.

This invention relates to that class of rotary pumps which are providedwith a rotating :0 cylinder arranged eccentrically in the shell or caseand having sliding pistons which revolve with the cylinder. Such pumpsare used,

among other purposes, for pumping soapmakers stock, molasses, andsimilar liquids.

These liquids frequently contain hard foreign substancessuch as nails,gravel, &c.-which are liable to enter between the cylinderor pistons andthe abutment of the case and injure the pump or impair its action.

My invention has for its object to provide the cylinder with simplemeans for preventing injury to the pump by such hard substances.

In the accompanying drawings, consisting of two sheets, Figure 1 is alongitudinal section of my improved pump. Fig. 2 is a similar viewthereof at right angles to Fig. 1.

Fig. 3 is a central cross-section of the same.

Fig. 4 is a horizontal section in line 4. Al, Fig. 0 3. Fig.5 is alongitudinal section of a modified construction of the pump in line 5 5,Fig. 7. Fig. 6 is a similar section in line 6 6, Fig. 7. Fig. 7 is acentral cross-section of said modified construction.

Like letters of reference refer to like parts in the several figures.

Referring to the construction shown in Figs. 1 to 4, A represents theinclosing shell or case of the pump, having the usual inlet or suc- 0tion nozzle 1) and outlet or discharge nozzle 0.

D is the rotary cylinder, arranged eccentrically in the case, and e theusual abutment against which the adjacent side of the cylinder bears.

F represents the sliding pistons, which are arranged in slots or ways g,formed in the cylinder. In the drawings two pistons are shown, which arearranged on opposite sides of the cylinder and which slide,preferably,in independent parallel slots or ways, which are separated bya longitudinal partition h, so as to avoid grinding of the pistonsagainst each other. Each piston consists of a flat smoothsided plateprovided at its outer edge on its front side with a lip or stop f, whichlimits its inward movement by striking the adjacent edge of thepartition h, the edges of the latter being located at a sufficientdistance inwardly from the periphery of the cylinder to permit-thepistons to recede fully into their slots or ways. Each of the slotsextends from side to side of the cylinder, so that the unoccupiedportion of the slot in rear of the inner edge of the correspondingpiston opens into the case and forms a pocket or recess in front of thepiston sliding in the other slot, as shown at g, which pockets areadapted to receive nails and other hard foreign substances contained inthe liquid. These pockets extend inwardly from the periphery of thecylinder to the inner or rear edges of the pistons, said inner edgesforming the bottom of the pockets.

g represents auxiliary pockets for hard foreign substances, arranged inthe periphery of the cylinder immediately in rear of the slidingpistons. I is a chamber or receptacle arranged in the bottom of thepump-case and communicating with the latter by a passage i. This chamberreceives the nails or other foreign substances from the pockets of thecylinder and is provided with a nozzle 01' hand-hole t", through whichsuch accumulated substances may be removed from time to time. During theoperation of the pump this hand-hole or nozzle is closed by a screw-plugThe revolving pistons after passing by the abutment 6 move outwardlybeyond the periphery of the cylinder, and in passing from the inlettoward the discharge nozzle of the case lift the liquid and expel itfrom the case in a well-known manner, Any solid foreign substancescontained in the liquid, such as a nail, which is too heavy to bedischarged with the current of liquid, is carried around the case by oneof the extended pistons until it reaches the upper side of thecylinder,when it drops into the pocket g immediately in front of saidpiston. The nail or other hard substance remains by gravity in thepocket until the piston passes the abutment, when the increasinginclination of the pocket allows the nail tofall into the pocketor'chamber I in the bottom of the case. The hard substances are thusretained in the pockets of the cylinder in the intervals during whichthe sliding pistons pass by the abutment and all danger of injuring thepartsof the'pump by the entrance of such substances between I theabutment and the pistons or the cylinder is therefore averted.

In order to prevent nails or other hard objects from lodging on theedges of the partition h, each of said edges is beveled or inclinedtoward the adjacent pocket, as shown at h in Fig. 3, to cause theobjects to slide into the pockets. In case such objects should, however,lodge on these edges the forwardly projecting lips of the pistons willcrowd the seine into the pockets upon the inward stroke of the pistons,the beveled edges of the par;- tition compelling the dislodg'rnent ofthe hard substances under the pressure of the receding piston-lipwithout causing injury to the piston and cylinder.

When the outer edges of the pistons become worn, small nails or otherhard substances are liable to pass between the pistons and thesurrounding casing, and in order to 'catch such substances the cylinderis provided with the auxiliary pockets 9*, which latterreceive thesubstances and deposit the same into the chamber 1.

If desired, my improvements may be applied to a pump having curved orsegmental pistons-,- as shown in Figs. .5, 6, and 7, as well as to apump having straight or flat pistons. In that case the guideways of thepistons are correspondingly curved, as shown in Fig. 7, and are arrangedequidistant, three ways and pistons being shown in the drawings. Therear ends of the ways open into the case, as in the first-describedconstruction, and the curved pistons are slotted or bifurcatedtransversely, as shown in Fig. 6, to clear the webs k of the cylinder.

The open slots or ways g of the pistons permit the pressure of thecolumn of discharging liquid to be exerted against the backs or inneredges of the pistons, thereby forcing the latter outward against thesurrounding wall of the case and rendering their action more reliablethan is the case when their outward movement depends on gravity alone.

J is-a flushing passage or nozzle which communicates, preferably, withthe top of the pump-case and through which steam may be delivered intoand through the case for cleaning the pump in the event of its becomingclogged, which is liable to occur in pumping.

soap-makers stock or similar thick liquid. The outer end of thisflushing-passage is normally closed by a screw-plugj, and in flushingthe pump the plugs of said passage and the nail-collecting receptacle Iare removed, so that the dislodged substances are blown off through thereceptacle I.

I claim as my invention 1. The combination with the inclosing case, ofthe rotary cylinder provided With'sliding pistons and pockets for thereception of foreign substances arranged in the cylinder adjacent tosaid pistons, substantially as set forth.

2. The combination with the inclosing case, of the rotary cylinderprovided with guide slots or ways, extending from side to side of thecylinder, and sliding pistons arranged in said slots, the open rearportion of each of said slots forming a pocket adjacent to the pistonsliding in the other slot, substantially as set forth.

3. The combination with the inclosingcase, of the rotary cylinderprovided with guide slots or ways extending from side to side of thecylinder and separated bya partition having beveled edges, and slidingpistons arranged in said slots, the open rear portion of each of saidslots forming a pocket adjacent to the piston sliding in the other slot,substantially as set forth.

4:. The combination with the inclosing case, of the rotary cylinderhaving guide slots or ways extending from side to side of the cylinderand separated by a partition having beveled edges, and pistons slidingin said slots and provided with lips or' stops adapted to strike againstsaid beveled edges, substantially as set forth.

5. The combination with the inclosing case, of the rotary cylinderprovided with sliding pistons, and pockets for the reception of foreignsubstances arranged in the periphery of the cylinder on the front andrear sides of the pistons, substantially as set forth.

6. The combination with the inclosin g case, provided in its bottom witha receptacle having a hand-hole, of a rotary cylinder provided withsliding pistons, and peripheral pockets arranged adjacent to saidpistons, substantially as set forth.

Witness my hand this 29th day of August, 1895.

BENJAMIN F. TABER.

Witnesses:

JNo. J. BONNER, KATHRYN ELMORE.

